PMID- 37434599 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230718 IS - 1664-462X (Print) IS - 1664-462X (Electronic) IS - 1664-462X (Linking) VI - 14 DP - 2023 TI - Mechanisms associated with the synergistic induction of resistance to tobacco black shank in tobacco by arbuscular mycorrhizal fungi and beta-aminobutyric acid. PG - 1195932 LID - 10.3389/fpls.2023.1195932 [doi] LID - 1195932 AB - Tobacco black shank (TBS), caused by Phytophthora nicotianae, is one of the most harmful diseases of tobacco. There are many studies have examined the mechanism underlying the induction of disease resistance by arbuscular mycorrhizal fungi (AMF) and beta-aminobutyric acid (BABA) alone, but the synergistic effects of AMF and BABA on disease resistance have not yet been studied. This study examined the synergistic effects of BABA application and AMF inoculation on the immune response to TBS in tobacco. The results showed that spraying BABA on leaves could increase the colonization rate of AMF, the disease index of tobacco infected by P.nicotianae treated with AMF and BABA was lower than that of P.nicotianae alone. The control effect of AMF and BABA on tobacco infected by P.nicotianae was higher than that of AMF or BABA and P.nicotianae alone. Joint application of AMF and BABA significantly increased the content of N, P, and K in the leaves and roots, in the joint AMF and BABA treatment than in the sole P. nicotianae treatment. The dry weight of plants treated with AMF and BABA was 22.3% higher than that treated with P.nicotianae alone. In comparison to P. nicotianae alone, the combination treatment with AMF and BABA had increased Pn, Gs, Tr, and root activity, while P. nicotianae alone had reduced Ci, H(2)O(2) content, and MDA levels. SOD, POD, CAT, APX, and Ph activity and expression levels were increased under the combined treatment of AMF and BABA than in P.nicotianae alone. In comparison to the treatment of P.nicotianae alone, the combined use of AMF and BABA increased the accumulation of GSH, proline, total phenols, and flavonoids. Therefore, the joint application of AMF and BABA can enhance the TBS resistance of tobacco plants to a greater degree than the application of either AMF or BABA alone. In summary, the application of defense-related amino acids, combined with inoculation with AMF, significantly promoted immune responses in tobacco. Our findings provide new insights that will aid the development and use of green disease control agents. CI - Copyright (c) 2023 Li, Cai, Chang, Yang, Zi and Liu. FAU - Li, Jia AU - Li J AD - College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming, China. AD - National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Kunming, China. AD - Key Laboratory of Medicinal Plant Biology, Yunnan Agricultural University, Kunming, China. FAU - Cai, Bo AU - Cai B AD - Technical Center of Yunnan Zhongyan Industry Co., Ltd, Kunming, China. FAU - Chang, Sheng AU - Chang S AD - Technical Center of Yunnan Zhongyan Industry Co., Ltd, Kunming, China. FAU - Yang, Ying AU - Yang Y AD - Technical Center of Yunnan Zhongyan Industry Co., Ltd, Kunming, China. FAU - Zi, Shuhui AU - Zi S AD - College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming, China. AD - National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Kunming, China. AD - Key Laboratory of Medicinal Plant Biology, Yunnan Agricultural University, Kunming, China. FAU - Liu, Tao AU - Liu T AD - College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming, China. AD - National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Kunming, China. AD - Key Laboratory of Medicinal Plant Biology, Yunnan Agricultural University, Kunming, China. LA - eng PT - Journal Article DEP - 20230626 PL - Switzerland TA - Front Plant Sci JT - Frontiers in plant science JID - 101568200 PMC - PMC10330952 OTO - NOTNLM OT - Phytophthora nicotianae OT - arbuscular mycorrhizal fungi OT - plant disease resistance OT - tobacco blank shank OT - beta-aminobutyric acid COIS- Authors BC, SC and YY were employed by Technical Center of Yunnan Zhongyan Industry Co., Ltd. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/07/12 06:42 MHDA- 2023/07/12 06:43 PMCR- 2023/01/01 CRDT- 2023/07/12 03:43 PHST- 2023/03/29 00:00 [received] PHST- 2023/06/01 00:00 [accepted] PHST- 2023/07/12 06:43 [medline] PHST- 2023/07/12 06:42 [pubmed] PHST- 2023/07/12 03:43 [entrez] PHST- 2023/01/01 00:00 [pmc-release] AID - 10.3389/fpls.2023.1195932 [doi] PST - epublish SO - Front Plant Sci. 2023 Jun 26;14:1195932. doi: 10.3389/fpls.2023.1195932. eCollection 2023.